Any coin that can be mined by CPU is a bad idea, as it's network can be dominated by a massive botnet.
On case of Magicoin hashrate is limited to 250 Kh/s by user but you can to get a thing beetwen 6 or 10 coins for day only.
That doesn't stop a botnet in any form, it just makes the creator make each infected pc mine on a new user that sends the funds to the main person.
Its true, But as far as almost of pools have a legend about "Botnets are not welcome" , And if the operator of pool detected any activity relationated with this like to a big number of accounts created recently, they can cancelled all accounts suspicious.
if it is a successful botnet it will have the hashrate to be its own pool, no need for others.